Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	0 Months Ended	12 Months Ended
	Nov. 15, 2012	May 31, 2013	May 31, 2012	May 31, 2011
Significant Accounting Policies [Line Items]
Stock split ratio for 100 percent of stock dividend declared	2
Reserve balances for sales discounts, returns and miscellaneous claims		$ 531	$ 455
Total advertising and promotion expenses		2,745	2,607	2,344
Prepaid advertising and promotion expenses		386	281
Allowance for uncollectible accounts receivable		104	91
Allowance for uncollectible accounts receivable, long-term		54	45
Goodwill		131	131
Trademark and Other intangible assets		$ 382	$ 370
Minimum | Building
Significant Accounting Policies [Line Items]
Property, plant and equipment, minimum useful life (in years)		2 years
Minimum | Leasehold Improvements
Significant Accounting Policies [Line Items]
Property, plant and equipment, minimum useful life (in years)		2 years
Minimum | Machinery and Equipment
Significant Accounting Policies [Line Items]
Property, plant and equipment, minimum useful life (in years)		2 years
Minimum | Software and Software Development Costs
Significant Accounting Policies [Line Items]
Property, plant and equipment, minimum useful life (in years)		2 years
Maximum | Building
Significant Accounting Policies [Line Items]
Property, plant and equipment, minimum useful life (in years)		40 years
Maximum | Leasehold Improvements
Significant Accounting Policies [Line Items]
Property, plant and equipment, minimum useful life (in years)		40 years
Maximum | Machinery and Equipment
Significant Accounting Policies [Line Items]
Property, plant and equipment, minimum useful life (in years)		15 years
Maximum | Software and Software Development Costs
Significant Accounting Policies [Line Items]
Property, plant and equipment, minimum useful life (in years)		10 years
Class B Common Stock
Significant Accounting Policies [Line Items]
Stock split ratio for 100 percent of stock dividend declared	2
Class A Convertible Common Stock
Significant Accounting Policies [Line Items]
Stock split ratio for 100 percent of stock dividend declared	2